| 青藏高原中段活动断层运动速度及驱动机理 |
| |
| 关键词:active fault slip rate driving mechanism Tibetan Plateau |
| 基金项目:国土资源部地质调查项目(编号:1212010340302);973项目(编号:95-13-01-06) |
|
| 摘要点击次数: 3505 |
| 全文下载次数: 2353 |
| 摘要: |
| Slip Rates and Driving Mechanism of Active Faults in Middle Tibetan Plateau |
| Slip rates of typical active faults were estimated and eastward motion of the crust was analyzed in the middle part of Tibetan Plateau based on large-scale geological survey and dating of active faults along the Golmud-Lhasa Railway. NW-NWW-EW trending Late Quaternary active faults were identified in the middle part of Tibetan Plateau. Active faults such as Kunlun, Hohxil, Tongtianhe, Bengcuo, Nianqingtanghla and Yaluzangbu had 6～10 mm/a average slip rates, Fenghuoshan, Wuli and Yanshiping had 3～4 mm/a average sliprates, whereas Tanggula and Gelincuo had 2 mm/a average slip rates in Late Pleistocene-Holocene. Since Late Pleistocene, the crust in the middle part of Tibetan Plateau has experienced evident eastward motion relative to the Qaidam block, with the eastward motion rate increasing gradually from both sides to central Tibetan Plateau and reaching 40 mm/a in the Tanggula Range. The displacement of active faults and the eastward crustal motion are very likely to have been caused by the coherence of S-N compression and the eastward shearing within the crust in Tibetan Plateau. |
| WU Zhen-han,HU Dao-gong,WU Zhong-hai,YE Pei-sheng,LIU Qi-sheng.2005.Slip Rates and Driving Mechanism of Active Faults in Middle Tibetan Plateau[J].Acta Geoscientica Sinica,26(2):99-104. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|